Spray gun



FIG. 1 is a perspective view showing our new design for the spray gun;

FIG. 2 is a front view of the spray gun;

FIG. 3 is a left view of the spray gun;

FIG. 4 is a right view of the spray gun;

FIG. 5 is a top view of the spray gun; and,

FIG. 6 is a bottom view of the spray gun.

The broken lines in the drawing depict environment subject matter only and form no part of the claimed design. 

The ornamental design for a spray gun, as shown and described. 